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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #ifndef	_SYS_FPRAS_H
     28 #define	_SYS_FPRAS_H
     29 
     30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     31 
     32 #ifdef	__cplusplus
     33 extern "C" {
     34 #endif
     35 
     36 /*
     37  * The following identify copy operations using the fpras mechanism.
     38  * They are used in array indexing so keep them sequential.
     39  */
     40 #define	FPRAS_BCOPY	0
     41 #define	FPRAS_COPYIN	1
     42 #define	FPRAS_COPYOUT	2
     43 #define	FPRAS_PGCOPY	3
     44 #define	FPRAS_NCOPYOPS	(FPRAS_PGCOPY + 1)
     45 
     46 /*
     47  * Identifying where fpras_failure was called from.
     48  */
     49 #define	FPRAS_FROMCHKFN	0
     50 #define	FPRAS_FROMTRAP	1
     51 
     52 /*
     53  * Return values from a check function.
     54  */
     55 #define	FPRAS_OK	0
     56 #define	FPRAS_BADCALC	1
     57 #define	FPRAS_BADTRAP	2
     58 
     59 #if !defined(_ASM)
     60 
     61 /*
     62  * Set if an architecture/cpu combination implements fpRAS.
     63  */
     64 extern int fpras_implemented;
     65 
     66 /*
     67  * Set in /etc/system to disable fpRAS mechanism at reboot.
     68  * Changing this value on a live system may have no effect (eg, if an
     69  * implementation checks only at startup).
     70  */
     71 extern int fpras_disable;
     72 
     73 /*
     74  * Set in /etc/system to disable checking of particular copy operations.  Set
     75  * bit N to disable checking of the corresponding copy operation (eg, bit 2
     76  * for copyout).  Changing this value on a live system may have no effect.
     77  */
     78 extern int fpras_disableids;
     79 
     80 /*
     81  * Function called from a check function to indicate an incorrect result
     82  * was obtained and from trap handlers to determine if the trap was due to
     83  * an fpRAS failure.  Symbol only appears for architecture/cpu combinations
     84  * that implement fpRAS.
     85  */
     86 #pragma	weak fpras_chktrap
     87 struct regs;
     88 extern int fpras_chktrap(struct regs *);
     89 extern int fpras_failure(int, int);
     90 
     91 #endif	/* !_ASM */
     92 
     93 #ifdef	__cplusplus
     94 }
     95 #endif
     96 
     97 #endif	/* _SYS_FPRAS_H */
     98